Robert Peary North Pole Expedition.
Sounding with piano wire through the ice.
Profile of soundings tends to corroborate that Peary made it to the North Pole.
Image ID: theb3791, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Location: Arctic Ocean
Photo Date: 1909
Credit: National Geographic Magazine, September 1988
• High Resolution Photo Available
of the U.S. Department of Commerce, National Oceanic & Atmospheric
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June 10, 2016